Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25
The AirTAC Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25 is a genuine double-acting MULTI-POSITION (tandem) air cylinder: two piston sections of 50mm and 25mm give 4 controllable stop positions across a 75mm total travel, with a Ø80mm bore, PT3/8 ports and adjustable end cushioning.
- BoreØ80 mm
- Stroke 150 mm
- Stroke 225 mm
- Total travel75 mm
- Positions4 stops
- Port sizePT3/8
About the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25
The SCT80X50X25 tandem cylinder delivers four defined rod positions—0 mm, 25 mm, 50 mm, and 75 mm—by pressurizing its two piston sections independently or together. With an 80 mm bore, each section generates 2513 N of push force at 0.5 MPa, rising to 4523 N at 0.9 MPa, making it a robust choice for multi-stop material handling tasks.
This double-acting unit uses a 25 mm diameter rod with PT3/8 ports and features a 28 mm adjustable air cushion at each end to manage deceleration. The tie-rod body has an A-length of 296 mm, providing a rigid structure for consistent positioning across all four stops without needing external hard stops.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25 Technical Specifications
| Model | Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25 |
|---|---|
| Series | SCT multi-position tie-rod cylinder |
| Bore size | Ø80 mm |
| Stroke 1 / Stroke 2 | 50 / 25 mm |
| Total travel | 75 mm |
| Stop positions | 4 positions |
| Acting type | Double acting (tandem, multi-position) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke / section | Up to 500 mm standard |
Specifications follow the official AirTAC SCT (multi-position) datasheet. SCT is available in bores 32–100; each of the two sections has a 500 mm max standard stroke (800 mm max). Confirm against the product label before installation. Thread options: PT (standard) / G.
Stop Positions (4)
| Position | Rod extension |
|---|---|
| P0 (retracted) | 0 mm |
| P1 (section 1) | 50 mm |
| P2 (section 2) | 25 mm |
| P3 (both extended) | 75 mm |
Positions are set by pressurising section 1, section 2, or both. With equal strokes you get 3 distinct positions; with unequal strokes you get 4.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Force is per actuated piston section (single-piston, same as the SC bore): push uses the full bore area, pull subtracts the rod area. Size with a safety margin.
Model Code: Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25
| SCT | Multi-position (tandem) tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm (SCT range 32–100). |
| ×50 | Stroke 1 (section 1) in mm. |
| ×25 | Stroke 2 (section 2) in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCD (double rod), SCJ (adjustable stroke). SCT mounting: Basic, FA, FB, CA, CB, LB. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25 Is Used
Two-Stage Sorting Gate
Uses the 25 mm and 50 mm positions to divert packages to two separate lanes, with full retraction for a third lane and full extension for a reject chute.
Sequential Part Feeding
Advances a pusher plate to a 25 mm pre-stage position, then to 50 mm for full engagement, allowing a secondary operation to complete between the two advance steps.
Multi-Depth Stop in Fixtures
Provides three distinct clamp or stop depths at 25 mm, 50 mm, and 75 mm for processing different part families in a single automated work cell.
Is the Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25 the Right Cylinder?
Choose the SCT80X50X25 when your application calls for four fixed stopping points along a 75 mm total stroke, eliminating the complexity of two separate cylinders and their valving. If your force requirements are lower, stepping down to the 63 mm bore reduces per-section push to 1559 N at 0.5 MPa; for higher thrust, the 100 mm bore offers 3927 N.
For a direct replacement, match the 80 mm bore, both the 50 mm and 25 mm strokes, PT port thread, and basic mounting configuration. Given the short strokes, rod side-loading is minimal, but always ensure the external load is guided to prevent off-axis forces on the rod bearing.
Multi-position checklist
- ✓ Need 4 repeatable stops?
- ✓ Section strokes 50 + 25 mm suit your layout?
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Plumb the two sections to the correct valves for each stop.
- check Adjust end cushion screws for smooth stops.
- check Use SCT mounting accessory (FA / FB / CA / CB / LB).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCT80~100 Multi-Position Tandem Cylinder SCT80X50X25 FAQ
This cylinder provides four discrete positions: fully retracted (0 mm), first section extended (25 mm), second section extended (50 mm), and both sections extended for full travel (75 mm). The positions are fixed by the two stroke lengths and are not infinitely adjustable.
The force output is per actuated piston section and matches a standard SC80 cylinder. At 0.5 MPa, each section delivers 2513 N push and 2268 N pull. The two sections do not combine their force to double the output; they simply position the rod at different stops.
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